Cold atoms in optical lattices :a Hamiltonian ratchet

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dc.creatorMonteiro, T. S.
dc.creatorDando, P. A.
dc.creatorHutchings, N. A. C.
dc.creatorIsherwood, M. R.
dc.date2002-03-19
dc.date2002-03-27
dc.date.accessioned2026-07-07T05:47:12Z
dc.date.available2026-07-07T05:47:12Z
dc.descriptionWe investigate a new type of quantum ratchet which may be realised by cold atoms in a double-well optical lattice which is pulsed with unequal periods. The classical dynamics is chaotic and we find the classical diffusion rate $D$ is asymmetric in momentum up to a finite time $t_r$. The quantum behaviour produces a corresponding asymmetry in the momentum distribution which is 'frozen-in' by Dynamical Localisation provided the break-time $t^* > t_r$. We conclude that the cold atom ratchets require $Db/ \hbar \sim 1$ where b is a small deviation from period-one pulses.
dc.descriptionnew version with typos corrected
dc.identifierhttps://arxiv.org/abs/physics/0203056
dc.identifierhttp://arxiv.org/abs/physics/0203056
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/84620
dc.subjectAtomic Physics
dc.subjectGeneral Physics
dc.titleCold atoms in optical lattices :a Hamiltonian ratchet
dc.typetext

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